An Organocatalytic Cascade Approach toward Polysubstituted Quinolines and Chiral 1,4-Dihydroquinolines-Unanticipated Effect of N-Protecting Groups
作者:Xinshuai Zhang、Xixi Song、Hao Li、Shilei Zhang、Xiaobei Chen、Xinhong Yu、Wei Wang
DOI:10.1002/anie.201202161
日期:2012.7.16
of a divergent organocatalytic aza‐Michael/aldol cascade process towardquinolines and 1,4‐dihydroquinolines depends on the choice of the N‐protecting group (see scheme; TEA=triethylamine, TMS=trimethylsilyl). Use of an electron‐donating sulfonyl group results in an unanticipated aza‐Michael/aldol/aromatization cascade to give polysubstitutedquinolines (right). In contrast, chiral 1,4‐dihydroquinolines
Metal free TBHP-promoted intramolecular carbonylation of arenes via radical cross-dehydrogenative coupling: synthesis of indenoquinolinones, 4-azafluorenones and fluorenones
作者:Kalpana Mishra、Ashok Kumar Pandey、Jay Bahadur Singh、Radhey M. Singh
DOI:10.1039/c6ob00998k
日期:——
A metal-free, TBHP-promoted economical route is developed via the sp2 C–H bond functionalization strategy for the synthesis of indenoquinolinones, 4-azafluorenones and fluorenones. Reactions provided excellent yield of the products under mild conditions. We have successfully synthesized 11H-indeno[1,2-b]quinolin-11-one, an antibacterial agent, in excellent yields.
通过sp 2 C–H键官能化策略开发了无金属,TBHP促进的经济路线,用于合成茚并喹啉酮,4-氮杂芴酮和芴酮。反应在温和的条件下提供了优异的产物收率。我们已经成功地以优异的产率成功合成了11 H-茚并[1,2- b ]喹啉-11-one。